Players are going up from underneath and getting in between his hands to jar the ball loose - it's the same problem he had at the beginning of the season. He needs to work on grip strength. He's also lost a bit of his explosiveness - probably a bit tired combined with a sore ankle. He plays at such a manic level for a big man. He'll just have to fight through it or learn to pace himself.
I agree. Don't get me wrong i love it when he tries to swat everything around the rim but he was just throwing himself around on every play, that level of activity is most definitely exhaustive and not sustainable. he has to learn to pick his spot and not play all out like that every game.
i haven't really seen a lot of situations where scouting has made a difference, so i think it's fatigue + ankle.